[Windows] Detect the right filter when saving a file.

FileDialog doesn't show the file extension when saving a
file, so we try to detect the right one so the user knows.

1 files changed, 23 insertions, 1 deletions

diff --git a/main/src/addins/WindowsPlatform/Dialogs/SelectFileDialogHandler.cs b/main/src/addins/WindowsPlatform/Dialogs/SelectFileDialogHandler.cs
index a3658a530d..7e8875f876 100644
--- a/main/src/addins/WindowsPlatform/Dialogs/SelectFileDialogHandler.cs
+++ b/main/src/addins/WindowsPlatform/Dialogs/SelectFileDialogHandler.cs
@@ -59,7 +59,7 @@ namespace MonoDevelop.Platform
 			

 			dialog.AddExtension = true;

 			dialog.Filter = GetFilterFromData (data.Filters);

-			dialog.FilterIndex = data.DefaultFilter == null ? 1 : data.Filters.IndexOf (data.DefaultFilter) + 1;

+			dialog.FilterIndex = data.DefaultFilter == null ? 1 : GetDefaultFilterIndex (data);

 			

 			dialog.InitialDirectory = data.CurrentFolder;

 

@@ -71,6 +71,28 @@ namespace MonoDevelop.Platform
 			if (openDialog != null)

 				openDialog.Multiselect = data.SelectMultiple;

 		}

+

+		static int GetDefaultFilterIndex (SelectFileDialogData data)

+		{

+			var defFilter = data.DefaultFilter;

+			int idx = data.Filters.IndexOf (defFilter) + 1;

+

+			// FileDialog doesn't show the file extension when saving a file,

+			// so we try to look fo the precise filter if none was specified.

+			if (data.Action == Gtk.FileChooserAction.Save && defFilter.Patterns.Contains ("*")) {

+				string ext = Path.GetExtension (data.InitialFileName);

+

+				if (!String.IsNullOrEmpty (ext))

+					for (int i = 0; i < data.Filters.Count; i++) {

+						var filter = data.Filters [i];

+						foreach (string pattern in filter.Patterns)

+							if (pattern.EndsWith (ext))

+								return i + 1;

+					}

+			}

+

+			return idx;

+		}

 				

 		static void SetFolderBrowserProperties (SelectFileDialogData data, FolderBrowserDialog dialog)

 		{